from our studios in new york city, this is charlie rose. >> rose: the united states constitution is over 225 years old. though our nation has transformed since the document was ratified, this text has remained largely unchanged. some scholars question relevance of the constitution in the modern day, others insist we must strictly adhere to the words of our founders, akhil amar suggests that we look beyond the text. he is the sterling professor at yale law school and a constitutional law scholar. his new book is called america's unwritten constitution, the precedence and principleses we live by. i am pleased to have him at this table. welcome. >> thank you. >> so what about this love affair with the constitution that you have, did it come from undergraduate z it come from law school, did it come from some sense of america and its -- >> it came from the day that i was born and because the day i'm born in ann arbor, michigan, my parents are not u.s. citizens. they ever's students, they're, they were here to do their medical training. they met in ann arbor and because of the first sente